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Sources and Accuracy
Length conversions use the metre as the reference unit. Common imperial relationships are exact where standardized, such as 1 inch = 0.0254 metre and 1 foot = 0.3048 metre.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
foot [ft]
Definition
The foot is an imperial and US customary length unit equal to exactly 12 inches or 0.3048 meters.
History
Foot-based measurement has long customary roots and was standardized internationally in the modern yard-pound system.
Current use
Feet are common in building plans, room sizes, height measurements, aviation altitude, and real estate.
centimeter [cm]
Definition
The centimeter is one hundredth of a meter and is a convenient metric unit for small everyday lengths.
History
Centimeters come from the decimal metric system, where prefixes make units scale cleanly by powers of ten.
Current use
Centimeters are common for body measurements, clothing sizes, school work, crafts, furniture, and product dimensions.